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Problem: Nowadays, we can not live without cards. We usually put several cards in our pocket, but it is not easy to differentiate the correct card from the other quickly and accurately when we need one.
Solution: The holes on this new kind of cards just like Braille for the blind, helping us to find the correct cards easier and quicker. By using our sense of touch instead of sense of sight, we just need to touch the holes by our fingers to differentiate the card we need from the others. The holes are larger than the real Braille, so as to make it easier for us to touch and differentiate.
Shanghai Maritime University